Tech Lead · Indie Dev · Sweden

Tomas Aroseus Tunström, frontend developer

Don
Tomasso

Building fast, modern web experiences. Clean code, thoughtful design.

Stack

React
Next.js
TypeScript
Tailwind CSS
Node.js

About

Tomas Aroseus Tunström, frontend developer from Sweden, building on the web under the alias DonTomasso.

Frontend tech lead consultant by day, indie coder by night. 19 years in the industry as a consultant, since 2007.

I care about the craft: fast load times, accessible interfaces, and code that's easy to reason about. I work primarily with React and Next.js, reach for TypeScript by default, and style with Tailwind CSS.

Projects

TuneFlip(opens in new tab)
How well do you know your music? TuneFlip puts your knowledge to the test with a timeline-based music game. Play solo or invite friends to a multiplayer showdown across genres and eras.
GameMusicMultiplayer
Spotpriser.nu(opens in new tab)
Track Swedish electricity spot prices in real time and cut your energy bill. The built-in planner tells you the cheapest windows to run your EV charger, dishwasher or heat pump.
DashboardReal-timeEnergy
Elsprisplanerare(opens in new tab)
Lärfabriken(opens in new tab)
Games and quizzes for kids aged 7 to 16 covering maths, Swedish, English and geography. Run multiplayer sessions in the classroom and let students compete for the top score in real time.
EdTechGamesMultiplayer
Lätt att lära(opens in new tab)
A modern psychology textbook built for the web, written for Swedish high school students. Makes psychology approachable and readable, free from the constraints of print. Built together with my wife.
EducationPsychology
Fågel.app(opens in new tab)
Discover every bird species found in Sweden, complete with photos and authentic sound recordings. A field guide in your pocket, built for curious beginners and seasoned birdwatchers alike.
NatureField Guide